DTC P2127 Throttle/Pedal Position Sensor/Switch "E" Circuit Low Input: Wiring Diagram

Engine Electrical System ENGINE TYPE FA (WITHOUT PUSH BUTTON START) <Ref. to 2.0L TURBO (WITHOUT PUSH BUTTON START), WIRING DIAGRAM, Engine Electrical System.>
Engine Electrical System ENGINE TYPE FA (WITH PUSH BUTTON START) <Ref. to 2.0L TURBO (WITH PUSH BUTTON START), WIRING DIAGRAM, Engine Electrical System.>

Fig 1: Throttle/Pedal Position Sensor/Switch E Circuit Diagram
Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN ECM AND ACCELERATOR PEDAL POSITION SENSOR CONNECTOR . Turn the ignition switch to OFF. Disconnect the connectors from ECM and accelerator pedal position sensor. Measure the resistance between the ECM connector and engine ground. Connector & terminal (B134) No. 18 - Engine ground: (B134) No. 29 - Engine ground:	Is the resistance 1 MΩ or more?	Go to step 2 .	Repair the short circuit to ground in harness between ECM connector and accelerator pedal position sensor connector.
2 CHECK SHORT CIRCUIT INSIDE THE ECM . Connect the connector to ECM. Measure the resistance between accelerator pedal position sensor connector and chassis ground. Connector & terminal (B315) No. 3 - Chassis ground:	Is the resistance 1 MΩ or more?	Replace the accelerator pedal. <Ref. to ACCELERATOR PEDAL .>	Repair the short circuit to ground in harness between ECM connector and accelerator pedal position sensor connector. Replace the ECM if defective. <Ref. to ENGINE CONTROL MODULE (ECM) .>